import { isPlainObject, isPrimitive } from './is';
/**
 * @description: 判断一个对象是否为看得到的空
 * @param {any} target
 * @return {boolean}
 */
export function isVisibleEmpty(target) {
    return (target === null ||
        target === undefined ||
        (typeof target === 'string' && target.trim() === ''));
}
/**
 * @description: 判断一个值是否为空
 * @param {any} value
 * @return {boolean}
 */
export function isEmptyValue(value, whitespace = true) {
    return (value === null ||
        value === undefined ||
        value === '' ||
        (typeof value === 'string' && !whitespace && value.trim() === '') ||
        (Array.isArray(value) && value.length === 0));
}
/**
 * @description: 判断一个值渲染到DOM中时是否可见
 * @param {any} value
 * @return {boolean}
 */
export function isRenderVisible(value) {
    return (value !== null &&
        value !== undefined &&
        (typeof value !== 'string' || value.trim() !== ''));
}
/**
 * @description: 判断是否绑定为空值
 * @param {any} target
 * @return {boolean}
 */
export function isEmptyBinding(target) {
    return target === null || target === undefined || target === '';
}
export function debounce(func, wait, options = {}) {
    let lastArgs, lastThis, maxWait, result, timerId, lastCallTime;
    let lastInvokeTime = 0;
    let leading = false;
    let maxing = false;
    let trailing = true;
    // Bypass `requestAnimationFrame` by explicitly setting `wait=0`.
    const useRAF = !wait && wait !== 0 && typeof requestAnimationFrame === 'function';
    if (typeof func !== 'function') {
        throw new TypeError('Expected a function');
    }
    wait = +wait || 0;
    if (isPlainObject(options)) {
        leading = !!options.leading;
        maxing = 'maxWait' in options;
        maxWait = maxing
            ? Math.max(+options.maxWait || 0, wait)
            : maxWait;
        trailing = 'trailing' in options ? !!options.trailing : trailing;
    }
    function invokeFunc(time) {
        const args = lastArgs;
        const thisArg = lastThis;
        lastArgs = lastThis = undefined;
        lastInvokeTime = time;
        result = func.apply(thisArg, args || []);
        return result;
    }
    function startTimer(pendingFunc, wait) {
        if (useRAF) {
            cancelAnimationFrame(timerId);
            return requestAnimationFrame(pendingFunc);
        }
        return setTimeout(pendingFunc, wait);
    }
    function cancelTimer(id) {
        if (useRAF) {
            return cancelAnimationFrame(id);
        }
        clearTimeout(id);
    }
    function leadingEdge(time) {
        // Reset any `maxWait` timer.
        lastInvokeTime = time;
        // Start the timer for the trailing edge.
        timerId = startTimer(timerExpired, wait);
        // Invoke the leading edge.
        return leading ? invokeFunc(time) : result;
    }
    function remainingWait(time) {
        const timeSinceLastCall = time - lastCallTime;
        const timeSinceLastInvoke = time - lastInvokeTime;
        const timeWaiting = wait - timeSinceLastCall;
        return maxing
            ? Math.min(timeWaiting, maxWait - timeSinceLastInvoke)
            : timeWaiting;
    }
    function shouldInvoke(time) {
        const timeSinceLastCall = time - lastCallTime;
        const timeSinceLastInvoke = time - lastInvokeTime;
        // Either this is the first call, activity has stopped and we're at the
        // trailing edge, the system time has gone backwards and we're treating
        // it as the trailing edge, or we've hit the `maxWait` limit.
        return (lastCallTime === undefined ||
            timeSinceLastCall >= wait ||
            timeSinceLastCall < 0 ||
            (maxing && timeSinceLastInvoke >= maxWait));
    }
    function timerExpired() {
        const time = Date.now();
        if (shouldInvoke(time)) {
            return trailingEdge(time);
        }
        // Restart the timer.
        timerId = startTimer(timerExpired, remainingWait(time));
    }
    function trailingEdge(time) {
        timerId = undefined;
        // Only invoke if we have `lastArgs` which means `func` has been
        // debounced at least once.
        if (trailing && lastArgs) {
            return invokeFunc(time);
        }
        lastArgs = lastThis = undefined;
        return result;
    }
    function cancel() {
        if (timerId !== undefined) {
            cancelTimer(timerId);
        }
        lastInvokeTime = 0;
        lastArgs = lastCallTime = lastThis = timerId = undefined;
    }
    function flush() {
        return timerId === undefined ? result : trailingEdge(Date.now());
    }
    function pending() {
        return timerId !== undefined;
    }
    function debounced(...args) {
        const time = Date.now();
        const isInvoking = shouldInvoke(time);
        lastArgs = args;
        lastThis = this;
        lastCallTime = time;
        if (isInvoking) {
            if (timerId === undefined) {
                return leadingEdge(lastCallTime);
            }
            if (maxing) {
                // Handle invocations in a tight loop.
                timerId = startTimer(timerExpired, wait);
                return invokeFunc(lastCallTime);
            }
        }
        if (timerId === undefined) {
            timerId = startTimer(timerExpired, wait);
        }
        return result;
    }
    debounced.cancel = cancel;
    debounced.flush = flush;
    debounced.pending = pending;
    return debounced;
}
export function throttle(func, wait, options = {}) {
    let leading = true;
    let trailing = true;
    if (typeof func !== 'function') {
        throw new TypeError('Expected a function');
    }
    if (isPlainObject(options)) {
        leading = 'leading' in options ? !!options.leading : leading;
        trailing = 'trailing' in options ? !!options.trailing : trailing;
    }
    return debounce(func, wait, {
        leading,
        trailing,
        maxWait: wait,
    });
}
/**
 * @description: 获取页面范围
 * @param {number} current 当前页码
 * @param {number} pageCount 总页数
 * @param {number} pageItemCount 要展示的页数
 * @return {[number, number]}
 */
export function getPageRange(current, pageCount, pageItemCount) {
    let min = current - Math.ceil((pageItemCount - 1) / 2);
    let max = current + Math.floor((pageItemCount - 1) / 2);
    const minLack = 1 - min;
    const maxLack = max - pageCount;
    if (maxLack > 0) {
        min -= maxLack;
    }
    if (min < 1) {
        min = 1;
    }
    if (minLack > 0) {
        max += minLack;
    }
    if (max > pageCount) {
        max = pageCount;
    }
    return [min, max];
}
/**
 * @description: 将一个可选单位的字符串或数值拆分为数值和单位组成的数组
 * @param {number | string} target
 * @return {[number, string]}
 */
export function splitUnit(target) {
    const result = /([+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|))([a-z]+|%|)$/i.exec(String(target)) || [0, ''];
    return [+result[1], result[2]];
}
export const noop = () => { };
export function getMayPrimitiveOption(option, key) {
    return isPrimitive(option) ? option : option[key];
}
export async function sleep(time) {
    return new Promise((resolve) => {
        setTimeout(resolve, time);
    });
}
